Resilient elastomer and metal retainer gasket for sealing between curved surfaces

Abstract

A gasket assembly for interposition between a mating, mutually-opposed pair of curved surfaces. The gasket includes a flexible metal retainer, and at least one seal element which is supported on the retainer along at least a portion of the inner or outer perimeter thereof. In a stressed state, such as under compression between two curved interface surfaces, the retainer is made to conform to curvatures of the surfaces. However, upon being removed from compression, the retainer substantially recovers to its normal state.

What is claimed is:  
     
       1. A gasket assembly for interposition between a first and a second interface surface each having a radial extent and being curved in at least one axial direction normal to said radial extent, said second interface surface being disposed in mutually-facing opposition with said first interface surface, said assembly comprising: 
       a resilient primary retainer formed of a metal material and having an inner perimeter and an outer perimeter defining an enclosed geometric shape which extends in a normal state of said gasket assembly within a first plane to a first diametric extent along at least one first axis, and to a second diametric extent along at least one second axis disposed within said first plane generally perpendicular to said first axis, said primary retainer being flexible in said first diametric extent along at least one first radius of curvature disposed within a corresponding second plane generally perpendicular to said first plane, and in said second diametric extent along at least one second radius of curvature disposed within a corresponding third plane generally perpendicular to said first and said second plane, and said primary retainer having an inner axial surface which defines the inner perimeter thereof, and an outer axial surface which defines the outer perimeter thereof; and  
       at least one generally annular primary seal element formed of an elastomeric material and compressible axially intermediate the first and second interface surfaces for effecting one or more fluid-tight seals therebetween, each said primary seal element being supported on said primary retainer and attached to a corresponding one of said inner or outer axial surface of said primary retainer, and to extend coaxially about at least a portion of said inner or said outer perimeter of said primary retainer, and having oppositely-disposed first and second radial sealing surfaces configured for abutting, sealing contact with a corresponding one of the interfaces surfaces,  
       whereby with the gasket assembly being interposed between the first and second interface surfaces with the first and second radial sealing surfaces of each said primary seal element being disposed in abutting contact with a corresponding one of the interface surfaces, each said primary seal element is compressible axially intermediate the interface surfaces effecting in a stressed state of said gasket assembly one or more fluid-tight seals between the interface surfaces, said primary retainer being curved along one or both said first and said second radius of curvature in said stressed state of said gasket assembly to conform to the interface surfaces, and  
       whereby said gasket assembly substantially recovers to said normal state from said stressed state upon being removed from compression between the interface surfaces.  
     
     
       2. The gasket assembly of  claim 1  wherein said metal material forming said primary retainer is selected from the group consisting of aluminum, steel, stainless steel, copper, brass, titanium, nickel, and alloys thereof. 
     
     
       3. The gasket assembly of  claim 1  wherein said elastomeric material forming said primary seal element is selected from the group consisting of natural rubbers and synthetic rubbers. 
     
     
       4. The gasket assembly of  claim 1  wherein said primary retainer has a first radial surface extending intermediate the inner and the outer perimeter thereof, and a second radial surface disposed opposite the first radial surface and extending intermediate the inner and the outer perimeter thereof, said first and said second radial surface defining an axial thickness dimension of said primary retainer therebetween, said axial thickness dimension being about 25 mils or less. 
     
     
       5. The gasket assembly of  claim 1  wherein each said primary seal element extends substantially continuously about the entirety of said inner or said outer perimeter of said primary retainer. 
     
     
       6. The gasket assembly of  claim 1  wherein each said primary seal element is formed as having one or more generally-spherical bead portions, each of said bead portions defining a corresponding said first and said second radial sealing surface of said primary seal element. 
     
     
       7. The gasket assembly of  claim 1  wherein each of interface surfaces further includes one or more bores in registration with a corresponding one of the bores of the other interface surface for defining a hole configured to receive an associated fastener member, and wherein said primary retainer further comprises one or more apertures formed axially therethrough intermediate the inner and the outer perimeter thereof, each of said apertures being configured for generally coaxial registration with a corresponding one of the fastener member holes. 
     
     
       8. The gasket assembly of  claim 1  wherein said assembly further comprises: 
       at least one divider member disposed within the enclosed geometric shape of said primary retainer to extend within said first plane across one of the diametric extents thereof for interposition between one of the first and second interface surfaces and a third interface surface disposed in mutually-facing opposition with said one of the first and second interface surfaces, each said divider member including:  
       a secondary retainer extending intermediate opposite first and second ends, and having an outer margin; and  
       a generally annular secondary seal element formed of an elastomeric material and compressible axially intermediate said one of the first and second interface surfaces and said third interface surface for effecting a second fluid-tight seal within said first fluid-tight seal, said secondary seal element being supported on said secondary retainer to extend along at least a portion of the outer margin thereof, and having oppositely-disposed first and second radial sealing surfaces configured for abutting, sealing contact with a corresponding one of the interfaces surfaces; and  
       a first and a second diaphragm member each formed of an elastomeric material and extending intermediate said primary retainer and a corresponding one of said opposite first and second ends of said secondary retainer element to flexibly join said one of said ends to said primary retainer.  
     
     
       9. The gasket assembly of  claim 8  wherein: 
       said third interface surface has a radial extent and is curved in at least one axial direction normal to said radial extent; and  
       said secondary retainer is formed of a metal material and is resiliently flexible in said one of the diametric extents along the corresponding first or second radius of curvature,  
       whereby said secondary retainer is curved along said corresponding first or second radius of curvature in said stressed state of said gasket assembly to conform to the third interface surface.  
     
     
       10. A joint assembly comprising: 
       a first and a second interface surface each having a radial extent and being curved in at least one axial direction normal to said radial extent, said second interface surface being disposed in mutually-facing opposition with said first interface surface; and  
       a gasket interposed between said first and second interface surfaces, said gasket comprising:  
       a resilient primary retainer formed of a metal material and having an inner perimeter and an outer perimeter defining an enclosed geometric shape which extends in a normal state of said gasket within a first plane to a first diametric extent along at least one first axis, and to a second diametric extent along at least one second axis disposed within said first plane generally perpendicular to said first axis, said primary retainer being flexible in said first diametric extent along at least one first radius of curvature disposed within a corresponding second plane generally perpendicular to said first plane, and in said second diametric extent along at least one second radius of curvature disposed within a corresponding third plane generally perpendicular to said first and said second plane, and said primary retainer having an inner axial surface which defines the inner perimeter thereof, and an outer axial surface which defines the outer perimeter thereof; and  
       at least one generally annular primary seal element formed of an elastomeric material and attached to a corresponding one of said inner or outer axial surface of said primary retainer, to each extend coaxially about at least a portion of said inner or said outer perimeter of said primary retainer, each said primary seal element having oppositely-disposed first and second radial sealing surfaces in abutting contact with a corresponding one of the interfaces surfaces, and being compressed axially intermediate said interface surfaces effecting one or fluid-tight seals between the interface surfaces, said primary retainer being curved along one or both said first and said second radius of curvature in a stressed state of said gasket by the compression of said primary seal elements to conform to said interface surfaces,  
       primary whereby said gasket substantially recovers to said normal state from said stressed state upon being removed from compression between said interface surfaces.  
     
     
       11. The joint assembly of  claim 10  wherein said metal material forming said primary retainer is selected from the group consisting of aluminum, steel, stainless steel, copper, brass, titanium, nickel, and alloys thereof. 
     
     
       12. The joint assembly of  claim 10  wherein said elastomeric material forming said primary seal element is selected from the group consisting of natural rubbers and synthetic rubbers. 
     
     
       13. The joint assembly of  claim 10  wherein said primary retainer has a first radial surface extending intermediate the inner and the outer perimeter thereof, and a second radial surface disposed opposite the first radial surface and extending intermediate the inner and the outer perimeter thereof, said first and said second radial surface defining an axial thickness dimension of said primary retainer therebetween, said axial thickness dimension being about 25 mils or less. 
     
     
       14. The joint assembly of  claim 10  wherein each said primary seal element extends substantially continuously about the entirety of said inner or said outer perimeter of said primary retainer. 
     
     
       15. The joint assembly of  claim 10  wherein each said primary seal element is formed as having one or more generally-spherical bead portions, each of said bead portions defining a corresponding said first and said second radial sealing surface of said primary seal element. 
     
     
       16. The joint assembly of  claim 10  further comprising one or more fastener members and wherein: 
       each of said interface surfaces further includes one or more bores disposed in registration with a corresponding one of the bores of the other interface surface for defining a hole receiving an associated said fastener member; and  
       said primary retainer has one or more apertures formed axially therethrough intermediate the inner and the outer perimeter thereof, each of said apertures being registered coaxially with a corresponding one of the fastener member holes and receiving an associated said fastener member therethrough.  
     
     
       17. The joint assembly of  claim 10  wherein said assembly further comprising: 
       a third interface surface disposed in mutually-facing opposition with one of the first and second interface surfaces;  
       at least one divider member disposed within the enclosed geometric shape of said primary retainer to extend within said first plane across one of the diametric extents thereof, each said divider member being interposed between said one of the first and second interface surfaces and said third interface surface divider member and including:  
       a secondary retainer extending intermediate opposite first and second ends, and having an outer margin; and  
       a generally annular secondary seal element formed of an elastomeric material and supported on said secondary retainer to extend along at least a portion of the outer margin thereof, said secondary seal element having oppositely-disposed first and second radial sealing surfaces disposed in abutting contact with a corresponding one of the interfaces surfaces and compressed axially intermediate said one of the first and second interface surfaces and said third interface surface effecting a second fluid-tight seal within said first fluid-tight seal; and  
       a first and a second diaphragm member each formed of an elastomeric material and extending intermediate said primary retainer and a corresponding one of said opposite first and second ends of said secondary retainer element to flexibly join said one of said ends to said primary retainer.  
     
     
       18. The joint assembly of  claim 17  wherein: 
       said third interface surface has a radial extent and is curved in at least one axial direction normal to said radial extent; and  
       said secondary retainer is formed of a metal material and is resiliently flexible in said one of the diametric extents along the corresponding first or second radius of curvature,  
       whereby said secondary retainer is curved along said corresponding first or second radius of curvature in said stressed state of said gasket to conform to the third interface surface.  
     
     
       19. A method of sealing a first and a second interface surface each having a radial extent and being curved in at least one axial direction normal to said radial extent, said second interface surface being disposable in mutually-facing, opposition with said first interface surface and said method comprising the steps of: 
       (a) providing a gasket assembly including:  
       a resilient primary retainer formed of a metal material and having an inner perimeter and an outer perimeter defining an enclosed geometric shape which extends in a normal state of said gasket assembly within a first plane to a first diametric extent along at least one first axis, and to a second diametric extent along at least one second axis disposed within said first plane generally perpendicular to said first axis, said primary retainer being flexible in said first diametric extent along at least one first radius of curvature disposed within a corresponding second plane generally perpendicular to said first plane, and in said second diametric extent along at least one second radius of curvature disposed within a corresponding third plane generally perpendicular to said first and said second plane, and said primary retainer having an inner axial surface which defines the inner perimeter thereof, and an outer axial surface which defines the outer perimeter thereof; and  
       at least one generally annular primary seal element formed of an elastomeric material and compressible axially intermediate the interface surfaces for effecting one or more fluid-tight seals therebetween, (each said primary seal element being attached to a corresponding one of said inner or outer axial surface of said primary retainer to extend coaxially about at least a portion of said inner or said outer perimeter of said primary retainer, and having oppositely-disposed first and second radial sealing surfaces;  
       (b) interposing said gasket assembly between said interface surfaces such that each said primary seal element abuttingly contacts a corresponding one of the interfaces surfaces;  
       (c) compressing each said primary seal element axially intermediate said interface surfaces effecting one or more fluid-tight seals between the interface surfaces, said primary retainer being curved along one or both said first and said second radius of curvature in a stressed state of said gasket assembly by the compression of said primary seal elements to conform to said interface surfaces; and  
       (d) removing said assembly from compression between said interface surfaces, said gasket assembly substantially recovering to said normal state from said stressed state.  
     
     
       20. The method of  19  wherein said metal material forming said primary retainer of said gasket assembly provided in step (a) is selected from the group consisting of aluminum, steel, stainless steel, copper, brass, titanium, nickel, and alloys thereof. 
     
     
       21. The method of  19  wherein said elastomeric material forming said primary seal element of said gasket assembly provided in step (a) is selected from the group consisting of natural rubbers and synthetic rubbers. 
     
     
       22. The method of  19  wherein said primary retainer of said gasket assembly provided in step (a) has a first radial surface extending intermediate the inner and the outer perimeter thereof, and a second radial surface disposed opposite the first radial surface and extending intermediate the inner and the outer perimeter thereof, said first and said second radial surface defining an axial thickness dimension of said primary retainer therebetween, said axial thickness dimension being about 25 mils or less. 
     
     
       23. The method of  claim 19  wherein each said primary seal element of said gasket assembly provided in step (a) extends substantially continuously about the entirety of said inner or said outer perimeter of said primary retainer. 
     
     
       24. The method of  19  wherein each said primary seal element of said gasket assembly provided in step (a) is formed as having one or more generally-spherical bead portions, each of said bead portions defining a corresponding said first and said second radial sealing surface of said primary seal element. 
     
     
       25. The method of  claim 19  wherein said gasket assembly further includes: 
       at least one divider member disposed within the enclosed geometric shape of said primary retainer to extend within said first plane across one of the diametric extents thereof for interposition between one of the first and second interface surfaces and a third interface surface disposable in mutually-facing opposition with said one of the first and second interface surfaces, each said divider member being interposed between said one of the first and second interface surfaces and said third interface surface divider member and including:  
       a secondary retainer extending intermediate opposite first and second ends, and having an outer margin; and  
       a generally annular secondary seal element formed of an elastomeric material and supported on said secondary retainer to extend along at least a portion of the outer margin thereof, said secondary seal element having oppositely-disposed first and second radial sealing surfaces disposed in abutting contact with a corresponding one of the interfaces surfaces and compressed axially intermediate said one of the first and second interface surfaces and said third interface surface effecting a second fluid-tight seal within said first fluidtight seal; and  
       a first and a second diaphragm member each formed of an elastomeric material and extending intermediate said primary retainer and a corresponding one of said opposite first and second ends of said secondary retainer element to flexibly join said one of said ends to said primary retainer.  
     
     
       26. The method of  claim 25  wherein: 
       said third interface surface has a radial extent and is curved in at least one axial direction normal to said radial extent; and  
       said secondary retainer is formed of a metal material and is resiliently flexible in said one of the diametric extents along the corresponding first or second radius of curvature,  
       whereby said secondary retainer is curved along said corresponding first or second radius of curvature in said stressed state of said gasket assembly to conform to the third interface surface.  
     
     
       27. A gasket assembly for interposition between a first interface surface and a second and a third interface surface, said second and said third interface surface being disposed in mutually-facing opposition with said first interface surface, said assembly comprising: 
       a primary retainer having an inner perimeter and an outer perimeter defining an enclosed geometric shape which extends to a first diametric extent along at least one first axis, and to a second diametric extent along at least one second axis disposed generally perpendicular to said first axis;  
       at least one divider member disposed within the enclosed geometric shape of said primary retainer to extend across one of the diametric extents thereof for interposition between the first interface surface and the second and third interface surfaces, each said divider member including a secondary retainer extending intermediate opposite first and second ends; and  
       a first and a second diaphragm member each formed of an elastomeric material and each extending intermediate said primary retainer and a corresponding one of said opposite first and second ends of said secondary retainer element to flexibly join said one of said ends to said primary retainer.